Surface rod line jack



I Get 25, '1938. c. LAMB SURFACE ROD LINE JACK 2 Sheets-Sheet l vInventor @1 9 Ji Attorneys" Filed May 9, 1958 Get. 25, 1938. Q LAMB2,134,615

.SURFACE ROD LINE JACK Filed May 9, 1938 2 Sheets-Sheet 2 m III [/11 J-C'a Zea-176ml Invnior' A ttorneys 15 Other objects of the inventionareto provide a jacent link I s a eve having mounted on 15 25 drawingswherein like characters of reference post I is aslide 2| of suitablemetal. Grease cup 25 30' hooked off.

40 be seen that'the embodiment of the invention f t e Sp A150 mounted onthis end D 40 Patented Oct. 25, 1938 a; v

7 *SURFACE R OD'LINE JAo v L e a t'wnan kl -i assi n of one l htl nnaait a P l a e Ok -t "Application May' 9, 1938; Serial No. 206,96} t c tlfi f i i -li'ie a lf 11 I r The present-invention relates to newanduseful" onthe inclined top H of; the block 3 for lubricat improvementsinpower "rodline jacks particularly ing the ratchet-ban Bthrough a duct l2in said for] oil wens-and has for its" primary object to bloolr. v Therodline (not shown)' is adapted to be provide, in a manneras'hereinait'er set forth; a connected toth e end 13 of the ratchetbarfi,

F device'of; this character embodyingja; novel con- Metallic links M are'pivotally rnounted for .struction, combination and: arrangementofpa'rts swinging movement in a vertical plane on the through the mediumof which a well may em; sides; of the block '3; Fivotallymounted on" thep'e'ditiously hooked on and oiffwithout danger of; links l ijandstraddling the block 3 is a substan-} l injuringthe operator;whichfrequently occurs at tiall'y il shaped pawl l5'which is engageablewith 1 present. a 3 theteth 9-for releasably locking the ratchet'bar 10A no thervery important object of the invention 5agains'tlongitudinalrnove rne nt toward the pump is toprovide'a surface rod linejack of the aforejacki Projecting nom one side ofthe substani mentionedcharacter embodying means for taking tially U-shaped pawl I5 is a, pinor lug l6: 1 Piv-' up slack in the power line. otally mounted on thefree end portion of the adsurface rod line jack of the characterdescribed one end portion a, Weight The Other end p which will becomparatively simple in construction of the lever H is engageable withthe lug I6 tion, strong, durable, highly efi'icient and reliable. forlifting the pawl I5 out of engagement with the in use, compact and whichmay be manufactured ratchet bar 6. Connected to this end portion of atlow cost. the lever I1 is an assist spring 19 one end of 20 All of the,foregoing and still further objects which is connected to a suitablebracket 20 on the and advantages of the invention will become appost I.parent from a study of the following specifica- Mounted for lon ud almove ent on the tion, taken in connection with the accompanying ratchetbar 6 on the power side of the knock-01f designate corresponding partsthroughout the 22 are prov d o the Slide 2 Pivotally mountseveralviews,and wherein: ed at an intermediate point on the slide 2| is aFigure 1 is a view in side elevation of an emlatch 23 which isengageable with the teeth 9 for bodiment of theinvention, showing thedevice cu in s sli 2| a ain t l n i udinal move- 7 I ment on the ratchetbar 6. The latch 23 is en- Figure 2 is a side elevational view, showingthe gage b e W the ratchet bar 5 through an p device hooked on. a ing 24which is provided therefor in the slide 2|. Figure 3 is a perspectiveView of the slide and Mounted on One end portion of the de 2| is a theparts carried thereby. handle 25. A spring 26 has one end connected toFigure 4 is an elevational view of the knockthe handle 25 and its otherend connected to the 35 off post and the elements mounted thereon. latc3 o disengaging d latch from the Figure 5 is a vertical sectional view,taken sub-- ratchet bar 6. A handle 21 is provided on the stantially onthe line 5-5 of Fig. 4. free end portion of the latch 23 for engagingsaid Referring now to the drawings in detail, it will latch with theratchet'bar 6 against the tension which has been illustrated comprises aknock-off o o t s e 2| and extending longitudinally post which isdesignated generally by the refertherefrom is a suitable connector 28.Theconence numeral l. The post I includes a metallic hector 23 y be fit0 the Slide 2| n a y suittube or pipe 2 having mounted thereon a block3 able e as by We ding. The reference nuof suitable material, preferablywood. The block m a 9 designates t d line to t p wer 5 3 is providedwith a depending portion 4 which, Which is coupled to the e or 8. Aguide as illustrated to advantage in Fig. 5 of the a d su po p s s v dfor the. power drawings,lis secured in the pipe 2 through the e mediumof-a bolt 5. v It is thought that the operation of the device Thereference numeral 6 designates a ratchet Will be readily apparent from ao deration of 50 bar which extends slidably through a horizontal th soparticularly o hose sk lled in the opening I which is provided thereforin the block art to which the invention pertains. When it is 3. The bar6 is provided with a plurality of desired to knock 01? a well, the leverIT is simply longitudinally spaced notches 8 in its upper edge swung tothe position shown in Fig. 1 of the providing teeth 9. A grease cup lflis mounted" drawings. The weight I8 is heavy enough to 55 overcome thespring [9. With the lever I! in this position the pawl l5 swingsdownwardly and engages one of the teeth 9 of the ratchet bar 6 forlocking said ratchet bar against movement toward the well. Further, theweighted lever I! rests on the lug 16 for retaining the pawl IS inengagement with the ratchet bar 6. It may be well to here state thatwhen the well is hooked on, the latch 23 is engaged with one of theteeth 9 of the ratchet bar 6 for connecting the slide 2| thereto, saidlatch being held in engagement in this manner against the tension of thespring 26 by the constant load on the jack. When the slide 2| movesforwardly, with the ratchetbar 6 locked against forward movement by thepawl I5, the latch 23 is relieved of the load and is immediately swungupwardly to disengaged or inoperative position, thus hooking oif saidslide 2 I. When it is desired to hook the well on again the lever I! isswung to the position shown in Fig. 2 of the drawings. The spring I9assists in doing this. When swung to this position, one end portion ofthe lever I1 engages beneath the lug I 6 and raises the substantiallyU-shaped pawl I5 out of engagement with the ratchet bar 6. The latch 23is then swung downwardly against the tension of the spring-26 throughthe medium of thehandle 21 for engagement with one of the teeth 9 foragain operatively connecting the slide 2| to the ratchet bar 6.Obviously, the adjustability of the members 5 and 2| relative to eachother permits slack in the power line to be readily taken up.

It is believed that the many advantages of a surface rod line jackconstructed in accordance with the present invention will be readilyunderstood and although a preferred embodiment of the device is asillustrated and described, it is to be understood that changes in thedetails of construction and in the combination and arrangement of partsmay be resorted to which will fall within the scope of the invention asclaimed.

What is claimed is:-

A surface rod line jack comprising a knock-off post, said post includinga vertical metallic pipe, a'block mounted on the upper end of said pipe,said block having an opening extending horizontally therethrough, aratchet bar extending slidably through the opening, links mounted forswinging movement in a vertical plane on the block, a substantiallyU-shaped "pawl pivotally mounted on said links and engageable with theratchet bar for releasably securing said ratchet bar againstlongitudinal movement in one direction, a lug projecting from said pawl,a lever pivotally mounted on one of the links and engageable with thelug for engaging the pawl with the ratchet bar or for disengaging saidpawl from said ratchet bar, a weight on one end portion of the lever, aspring connected to the other end,

portion of the lever for assisting in swinging said lever in onedirection, and means for releasably connecting the ratchet bar to asource of p Qv5 er COY LEE LAMB.

